Philips DVR7100/75 Service Manual page 13

3. No Y/PB/PR output: Flow chart
No Y/PB/PR output
Yes
Check J19 connector is
Connected properly
Yes
Check J19 Y
signal is correct
Yes
Check J19 PB
signal is correct
Yes
Check J19 PR
signal is correct
Yes
Send back to zinwell
No
Firmly connect the
connector to right place
No
Check R391 has
proper signal
Yes
No Check R390 has
proper signal
Yes
No
Check R392 has
proper signal
Yes
Check L6(3.3v)
have right voltage
Yes
Send back to zinwell
13
No
Send back to zinwell
No
Send back to zinwell
No
Send back to zinwell
No
Check U11 have
right voltage
Send back to zinwell
No
Replace U11
Yes